I-Lotus RX Oncore User Manual - page 26
Document Number: 403
– GPS – 070
Page | 22
11 Module Installation Considerations
Every RX Oncore receiver has been carefully inspected and packaged to ensure optimum performance and quality
assurance. As with any piece of electronic equipment, proper installation is essential before you can use the
equipment. When mounting the RX Oncore receiver board into your housing system, special precautions need to
be considered. Before you install the receiver, please review the following:
11.1
Electrostatic Precautions
The RX Oncore printed circuit boards (PCBs) contain parts and assemblies sensitive to damage by electrostatic
discharge (ESD). Use ESD precautionary procedures when handling the PCB. Grounding wristbands and anti-static
bags are considered standard equipment in protecting against ESD damage.
11.2
Electromagnetic Considerations
The RX Oncore receiver PC boards contain a very sensitive RF receiver; therefore you must observe certain
precautions to prevent possible interference from the host system. Because the electromagnetic environment will
vary for each OEM application, it is not possible to define exact guidelines to assure electromagnetic compatibility.
The frequency of GPS is 1.575 GHz. Frequencies or harmonics close to the GPS frequency may interfere with the
operation of the receiver, desensitizing the performance. Symptoms include lower signal to noise values, longer
TTFFs and the inability to acquire and track signals. In cases where RF interference is suspected, common remedies
are to provide the receiver with additional RF shielding and/or moving the antenna away from the source of the
interference.
11.3
RF Shielding
The RF circuitry sections on the RX Oncore are surrounded with an RF dam to provide some protection against
potential interference from external sources. When a design calls for the RX Oncore to be near or around RF
sources such as radios, switching power supplies, microprocessor clocks, etc., it is recommended that the RX
Oncore be tested in the target environment to identify potential interference issues prior to final design. RX Oncore
PCB has an additional metal shield to eliminate electromagnetic compatibility (EMC) problems.